State Estimation Of a Quantum Cavity Driven by single-photon

TL;DR

This paper develops quantum filtering equations to estimate the state of a quantum cavity driven by a single-photon, comparing the results with traditional methods to improve understanding of non-classical light-matter interactions.

Contribution

It introduces quantum filtering equations for a single-photon driven cavity and compares their effectiveness with conventional master equations.

Findings

Quantum filtering provides accurate cavity state estimation.

Single-photon driving influences cavity dynamics distinctly.

Comparison shows advantages over traditional master equations.

Abstract

The cavity is a fundamental ingredient of quantum optical systems. This paper concerns the behavior of a quantum cavity driven by non-classical field in single-photon state. To this end, the number operator has been opted to reveal the number of photons inside the cavity. Then, the quantum filtering equations have been employed to derive a stochastic master equation for the cavity which is driven by single-photon and is observed by either Homodyne or photon-counting detector. Finally, the state of the cavity has been estimated by the derived equations, and the results have been compared with the conventional master equation.